Originally Posted by Formula350
You said you had bad performance. MPG and performance pretty much go hand in hand. The EGR isn't in use during WOT. Could be the EGR solenoid, but I dunno. It's on the BACK of the intake, wedged between the firewall and the intake.
The dirty valve can still stick open a bit at WOT or when it is supposed to be shut, hello vacuum leak.
I never had any luck cleaning them, tried many times and kept getting the code.
just replace it and be done with it.
Or do like I did and totally delete it. This will require block off plates and custom tune.